This model is discontinued
AirTAC has phased out the MALJ series. You can still order this code here: we ship the direct replacement MBLJ40X30-20-S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The MBLJ replacement upgrades to a riveted rolling-packed body and CMSG / DMSG / EMSG sensors (the MAL used CS1-M / DS1-M).
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S
The AirTAC Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S is a double-acting aluminum mini cylinder with a rear adjustable-stroke stopper: you can trim up to 20 mm, giving a usable end-position window from 10 to 30 mm. This model is discontinued — the direct replacement is the MBLJ40X30-20-S.
- BoreØ40 mm
- Stroke30 mm
- Adjust window10–30 mm
- Port sizeG1/4
- Rod threadM12×1.25
- StatusDiscontinued → MBLJ40X30-20-S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S
The AirTAC MALJ40X30-20-S is a discontinued double-acting double-rod cylinder with a 40 mm bore, 30 mm stroke, and a 20 mm rear adjuster. This yields a usable end-position window of 10-30 mm. The direct replacement is the MBLJ40X30-20-S.
This unit features a fixed rubber bumper, not an adjustable cushion. The rear adjuster is a travel stop, not a lock, so it cannot hold a load without live air. The original threaded covers and CS1-M/DS1-M magnet switches are upgraded to a riveted body and CMSG/DMSG/EMSG sensors on the MBLJ.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S Technical Specifications
| Model | Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S |
|---|---|
| Series | MALJ adjustable-stroke mini cylinder (discontinued) |
| Replacement | MBLJ40X30-20-S |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Adjustable window | 10 – 30 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.1 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Fixed rubber bumper |
| Max standard stroke | Up to 500 mm |
The rear adjuster is a travel stop, not a lock — it sets the end position but does not hold the load without live air. No back-cover code and no SDB on adjustable-stroke. The MBLJ40X30-20-S carries the same ratings.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | — |
| Max (@1.0 MPa) | 108 kgf | |
MALJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod MAL push of the same bore. The MBLJ40X30-20-S matches these values.
Model Code: Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S
| MALJ | Adjustable-stroke aluminum mini cylinder, double acting (discontinued). |
|---|---|
| 40 | Bore size in mm (20/25/32/40). |
| ×30 | Nominal stroke length in mm. |
| -20 | Adjustable amount: trim the end to a 10–30 mm window. |
| S | Optional magnet for a CS1-M / DS1-M sensor (MBLJ uses CMSG/DMSG/EMSG). |
Replacement: MALJ → MBLJ. No back-cover (CA/U/CM) and no SDB. Mounting: FA / LB.
Where the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S Is Used
Printed Circuit Board Tester
Dial the exact 10-30 mm reach for spring-loaded test pins.
Dispensing Valve Depth Stop
Set a precise dispense height for adhesive nozzles. The 20 mm rear adjuster lets you fine-tune the 30 mm stroke on the fly for different syringe tip lengths without adding external stops.
Wire Harness Crimper
Crimp small terminals with the 528 N pull force. The rear stopper allows micro-adjustments of the crimp depth to prevent terminal deformation across mixed wire gauges.
Replacing the Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S with MBLJ40X30-20-S
To replace this MALJ40X30-20-S, order the MBLJ40X30-20-S direct. Confirm the 40 mm bore, 30 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and FA/LB mounting (no back cover or SDB). The -S magnet changes from CS1-M/DS1-M to CMSG/DMSG/EMSG. The adjuster sets end position but does not hold load without air.
Upgrade checklist
- ✓ Order the MBLJ40X30-20-S (same bore/stroke/adjust)
- ✓ Same 10–30 mm adjustable window
- ✓ Adjuster is a stop, not a lock
- ✓ No back cover / SDB — plan an FA/LB mount
- ✓ Sensor: swap CS1-M/DS1-M → CMSG/DMSG/EMSG
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.1 – 1.0 MPa operating pressure.
- check The rear adjuster sets the end position — it is not a load lock.
- check No back-cover / SDB on adjustable-stroke — use FA / LB.
- check Front/rear covers are threaded — not for field disassembly.
- check For new builds, specify the MBLJ40X30-20-S instead of this discontinued model.
Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S FAQ
Yes, the MALJ40X30-20-S is discontinued. The direct replacement is the MBLJ40X30-20-S, which matches the 40 mm bore, 30 mm stroke, 20 mm adjust code, G1/4 port, and FA/LB mounting. The MBLJ upgrades the body to a riveted rolling-packed design and the -S magnet switches from CS1-M/DS1-M to CMSG/DMSG/EMSG.
The usable end-position window is 10-30 mm (30 mm stroke minus the 20 mm adjuster). The adjuster is a travel stop, not a lock, and cannot hold a load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
Direct Upgrade
The MBLJ40X30-20-S replaces this model 1:1.
Fast Dispatch
MBLJ replacements are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Recommended AirTAC MBLJ Replacements
Request a Quote (Airtac MALJ40 Adjustable Mini Cylinder MALJ40X30-20-S → MBLJ40X30-20-S)
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